中国电机工程学报2025，Vol.45Issue(12)：4567-4577,中插3,12.DOI:10.13334/j.0258-8013.pcsee.232799
低压多端直流系统稳定性提升的附加阻尼控制方法
Additional Damping Control Method for Improving Stability of Low Voltage Multi-terminal DC System
摘要
Abstract
Low-voltage multi-terminal DC systems have become one of the important forms of future power grids.With the high degree of power electronics and low damping characteristics of the system,wide-range fluctuations in renewable energy and load can easily lead to voltage oscillation problems in the system,especially under the droop control mode,where the actual stability boundary of the system significantly shrinks.This paper proposes an additional damping control method for multi-terminal DC systems under droop control.First,a nonlinear state space model under disturbance is constructed.On this basis,a state feedback control law is designed using Lyapunov theory to automatically generate additional damping power required by each VSC to maintain system stability.Then,the effectiveness of the proposed additional damping control method is verified through MATLAB simulation and dominant eigenvalue analysis.Finally,an experimental test platform is built for experimental verification.This method introduces a form of global additional control without changing the local droop control strategy of each VSC,which can suppress system voltage oscillations with minimal additional damping power under system disturbance,further extending the stability boundary of the system and meeting the stable operation requirements under large-scale renewable energy access and wide power fluctuations in the system.关键词
低压多端直流/下垂控制/附加阻尼/直流电压/稳定性Key words
low voltage multi-terminal DC/droop control/additional damping/DC voltage/stability分类
动力与电气工程引用本文复制引用
刘颜滔,邓卫,裴玮,李毅丰..低压多端直流系统稳定性提升的附加阻尼控制方法[J].中国电机工程学报,2025,45(12):4567-4577,中插3,12.基金项目
国家自然科学基金项目(52177122) （52177122）
国家重点研发计划项目(2023YFB2407500). Supported by the National Natural Science Foundation of China(52177122) （2023YFB2407500）
National Key R&D Program of China(2023YFB2407500). （2023YFB2407500）
